MCP4021T-103E/MC

Overview

The MCP4021T-103E/MC is a nonvolatile digital potentiometer featuring WiperLock technology for secure EEPROM storage. It offers 64 taps with a nominal resistance of 10 kΩ and ±20% tolerance. The device operates on a 2.7V to 5.5V supply and uses a simple Up/Down (U/D) serial interface with Chip Select (CS). Key electrical parameters include a typical wiper resistance of 70 Ω, low static current of 1 µA, and high-voltage tolerant inputs up to 12.5V. It supports linear taper configurations in an 8-DFN package.

Feature Summary

• Nonvolatile memory with WiperLock™ technology secures settings without external write-protect pins.
• High-voltage tolerant digital inputs allow control signals up to 12.5V while VDD is at 5.5V.
• Low power consumption with maximum static current of 1 µA during inactive states.
• Simple two-wire Up/Down serial interface reduces pin count and simplifies control logic.

Applications

• Audio volume control and tone adjustment circuits
• Programmable gain amplifiers and sensor biasing
• Voltage reference trimming and calibration
• Industrial process control loop adjustments

Procurement Notes

Verify the specific suffix 'MC' corresponds to the 8-DFN (2x3) package when sourcing. Confirm the 'T' indicates tape and reel packaging if required for automated assembly. Ensure the 'E' suffix matches the extended temperature range requirements (-40°C to +125°C). Cross-reference the datasheet revision to ensure compatibility with design specifications.

Selection Notes

Select this component for applications requiring persistent resistance settings after power loss. The 10 kΩ value suits moderate impedance circuits; verify input/output impedance constraints. The U/D interface is suitable for microcontrollers with limited GPIOs. Consider the 70 Ω wiper resistance impact on signal integrity for precision analog paths.

Part Context

This part belongs to the MCP4021/2/3/4 family of low-cost nonvolatile digital potentiometers. The MCP4021 variant specifically supports potentiometer configuration, whereas others may be rheostats. The family shares core features like WiperLock technology and high-voltage tolerant inputs across various resistance values and packages.

Replacement Considerations

Direct replacements within the same family include MCP4021T-103E/MS or MCP4021T-103E/SOIC depending on package preference. Verify that substitute parts maintain the 8-DFN footprint if board space is constrained. Check if alternative interfaces like SPI are acceptable if upgrading from U/D control.